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The water enters into chemical action with cement and this action causes ________ and ________ of concrete.

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The water enters into chemical action with cement and this action causes ________ and ________ of concrete.

(a) Swelling, shrinkage

(b) Expansion, contraction

(c) Setting, hardening

(d) Strong, weak

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Question is taken from Cement Concrete Construction topic in division Cement Concrete Construction of Construction & Building Materials

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Correct answer is (c) Setting, hardening

Best explanation: The water lubricates the aggregate and it facilitates the passage of cement with the voids of aggregates. This mean that water makes the concrete workable.

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